Working with OneDrive

Hi all

I am new to BI and have a question about handling data

I have created a set of data in excel files saved in one drive, I then created all the reports my company needs to see in powerbi desktop and shared them as an app workspace and at the moment I am manually refreshing every time any of the excel files change.

My question is I have read in multiple places that you can connect your power bi reports to onedrive to keep everything automatically updated when someone changes the excel files but I cannot see how to do this with something already created in powerBI desktop?

Dave